calls from the same pair of birds as in XC203452. They start out calling as they are mobbing the recordist, and then switch to chasing away a Pomarine Jaeger that flew in to investigate (calls from the Pomarine can be heard from 0:26 to 0:35). They then resume mobbing the recordist, with a broken-wing distraction display at 2:00.

calls from a pair of birds near their nest, on open, wet tundra. Distraction display calls audible in the background at several points during the cut (including at the beginning), while the other calls are all in flight.